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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Issue Type:</th> 
                                                    <td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-6df81753-fabd-431c-a598-3e519c30074d" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.2.17, 5.3.6 </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Assignee:</th> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Attachments:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> hibernate-orm-5.zip </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 28/Sep/2018 06:31 AM </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Environment:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> java version "1.8.0_161" <br> Hibernate 5.3.6 Final, 5.2,17 Final, 5.0.12 Final <br> Windows 10, <br> H2, Oracle XE </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Labels:</th> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Priority:</th> 
                                                    <td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-major-16fda3fc-d812-48ed-8133-d32c8fc2f447" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Reporter:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="silaev.ka" id="email_silaev.ka" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=silaev.ka" style="color:#6c797f;; color: #3b73af; text-decoration: none">Константин Силаев</a> </td> 
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                                                    <td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">Prerequisite:</p> 
                                                        <ol> 
                                                            <li>bidirectional @OneToOne relationship:<br> *@OneToOne(<br> mappedBy = "slot",<br> fetch = FetchType.LAZY,<br> cascade = {CascadeType.PERSIST, CascadeType.MERGE} <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0"> )</p></li> 
                                                        </ol> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0"> *@OneToOne(fetch = FetchType.LAZY)<br> @JoinColumn(name = "id")<br> @MapsId<br> @OnDelete(action = OnDeleteAction.CASCADE)</p> 
                                                        <ol> 
                                                            <li>"on delete cascade" foreign key;</li> 
                                                            <li>JPA.</li> 
                                                        </ol> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">While deleting the owner of this relationship via entityManager.remove, it doesn't have any impact on an underlying database.<br> Having said that, ORMUnitTestCase works fine, but it's not the case with JPAUnitTestCase. Please, take a look at both of then attached to this issue.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The workaround is not to trigger lifecycle callbacks and use entityManager.createQuery("delete...).executeUpdate();</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Here are 3 test cases:</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0"> //1 it doesn't work, but it's supposed to<br> entityManager.remove(entityManager.find(Slot.class, 1L));</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0"> //2 it works, but we are not supposed to delete Automobile manually.<br> //This is because, it's done by database via "on delete cascade" FK<br> entityManager.remove(entityManager.find(Automobile.class, 1L));<br> entityManager.remove(entityManager.find(Slot.class, 1L));</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0"> //3 it works, because no one lifecycle callbacks can be invoked<br> entityManager.createQuery("delete from Slot s where s.id =:id")<br> .setParameter("id", 1L)<br> .executeUpdate();</p> </td> 
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